when quantum computers become able to calculate quantum calculations, would that equal a psychic? Because wouldn't it be able to calculate possible future events at such a % it would become a true psychic device?
One statement about QC's I walked upon was "if you wish to simulate the evolution of a large quantum system, you'd rather build this very system and watch how it evolves, that would cost less than modelling it on a conventional supercomputer". So forget about predictions for systems like brain and so on. QC's won't necessarily be good at predictions at all, that will depend on simultaneous existence of mathematical models adapted for quantum computing and quantum algorithms that can solve the model equations. This area is too brand new yet, but eventually it may develop some sort of a social or economic quantum models.